一、概述随着我国水电建设步伐的加快,在高山峡谷地区将建设许多大、中型水电站,地应力已成为广大工程技术人员所关注的问题。在高地应力地区,地应力对岩体变形性质的影响已逐渐暴露出来。岩爆、饼状岩芯、葱皮状岩片剥落等现象,在许多地下洞室开挖的过程中出 I. Overview With the acceleration of China’s hydropower construction, many large and medium-sized hydropower stations will be built in the alpine gorge area, and the in-situ stress has become a concern of many engineering technicians. In the high-stress area, the influence of in-situ stress on the deformation properties of rock mass has gradually been exposed. Rock burst, cake core, onion skin flake peeling and so on, in many underground cavern excavation process